6621941 has 4 divisors (see below), whose sum is σ = 6835584. Its totient is φ = 6408300.

The previous prime is 6621931. The next prime is 6621943. The reversal of 6621941 is 1491266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6621941 - 2²² = 2427637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106775 + ... + 106836.

It is an arithmetic number, because the mean of its divisors is an integer number (1708896).

Almost surely, 2^6621941 is an apocalyptic number.

It is an amenable number.

6621941 is a deficient number, since it is larger than the sum of its proper divisors (213643).

6621941 is a wasteful number, since it uses less digits than its factorization.

6621941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213642.

The product of its digits is 2592, while the sum is 29.

The square root of 6621941 is about 2573.3132339457. The cubic root of 6621941 is about 187.7853763976.

The spelling of 6621941 in words is "six million, six hundred twenty-one thousand, nine hundred forty-one".